| 1 | # Choose a Terminal (serial vs. graphical consle) from GRUB |
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| 2 | |
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| 3 | # Author: Daniel Kahn Gillmor <dkg@fifthhorseman.net> |
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| 4 | # Date: 2009-09-29 12:44:06-0400 |
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| 5 | |
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| 6 | # this is a grub config file that offers 5 alternating 1-second |
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| 7 | # chances to hit ESC in either the serial console or the |
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| 8 | # graphical console to select which console to use for grub. |
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| 9 | |
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| 10 | # it is ridiculously long right now because grub |
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| 11 | # currently (2009-09-29) does not support any looping constructs, |
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| 12 | # so i've pasted them all together within the ABSURD LOOP |
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| 13 | # comments. |
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| 14 | |
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| 15 | # if looping constructs were possible, the ideal would be to have |
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| 16 | # this cycle through all possible terminal_input and |
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| 17 | # terminal_output choices (what if they don't match?) |
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| 18 | |
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| 19 | # You can load this file with a line in /boot/grub/grub.cfg like: |
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| 20 | |
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| 21 | # configfile /boot/grub/grub2-terminal-chooser |
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| 22 | |
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| 23 | insmod echo |
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| 24 | insmod sleep |
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| 25 | insmod test |
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| 26 | insmod serial |
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| 27 | serial --unit=0 --speed=115200 |
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| 28 | |
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| 29 | echo "checking for alternate inputs" |
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| 30 | |
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| 31 | ## BEGIN ABSURD LOOP |
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| 32 | |
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| 33 | if test $chosen_console == "" ; then |
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| 34 | if terminal_input serial ; then true ; else |
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| 35 | terminal serial |
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| 36 | fi |
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| 37 | if terminal_output serial ; then true ; else |
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| 38 | terminal serial |
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| 39 | fi |
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| 40 | echo "hit ESC to use serial..." |
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| 41 | if sleep --interruptible 1 ; then true; else |
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| 42 | chosen_console=serial |
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| 43 | fi |
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| 44 | fi |
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| 45 | |
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| 46 | if test $chosen_console == "" ; then |
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| 47 | if terminal_input console ; then true ; else |
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| 48 | terminal console |
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| 49 | fi |
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| 50 | if terminal_output console ; then true ; else |
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| 51 | terminal console |
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| 52 | fi |
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| 53 | echo "hit ESC to use graphical console..." |
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| 54 | if sleep --interruptible 1 ; then true; else |
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| 55 | chosen_console=console |
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| 56 | fi |
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| 57 | fi |
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| 58 | |
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| 59 | if test $chosen_console == "" ; then |
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| 60 | if terminal_input serial ; then true ; else |
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| 61 | terminal serial |
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| 62 | fi |
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| 63 | if terminal_output serial ; then true ; else |
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| 64 | terminal serial |
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| 65 | fi |
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| 66 | echo "hit ESC to use serial..." |
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| 67 | if sleep --interruptible 1 ; then true; else |
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| 68 | chosen_console=serial |
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| 69 | fi |
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| 70 | fi |
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| 71 | |
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| 72 | if test $chosen_console == "" ; then |
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| 73 | if terminal_input console ; then true ; else |
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| 74 | terminal console |
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| 75 | fi |
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| 76 | if terminal_output console ; then true ; else |
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| 77 | terminal console |
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| 78 | fi |
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| 79 | echo "hit ESC to use graphical console..." |
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| 80 | if sleep --interruptible 1 ; then true; else |
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| 81 | chosen_console=console |
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| 82 | fi |
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| 83 | fi |
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| 84 | |
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| 85 | if test $chosen_console == "" ; then |
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| 86 | if terminal_input serial ; then true ; else |
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| 87 | terminal serial |
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| 88 | fi |
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| 89 | if terminal_output serial ; then true ; else |
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| 90 | terminal serial |
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| 91 | fi |
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| 92 | echo "hit ESC to use serial..." |
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| 93 | if sleep --interruptible 1 ; then true; else |
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| 94 | chosen_console=serial |
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| 95 | fi |
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| 96 | fi |
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| 97 | |
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| 98 | if test $chosen_console == "" ; then |
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| 99 | if terminal_input console ; then true ; else |
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| 100 | terminal console |
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| 101 | fi |
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| 102 | if terminal_output console ; then true ; else |
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| 103 | terminal console |
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| 104 | fi |
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| 105 | echo "hit ESC to use graphical console..." |
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| 106 | if sleep --interruptible 1 ; then true; else |
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| 107 | chosen_console=console |
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| 108 | fi |
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| 109 | fi |
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| 110 | |
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| 111 | if test $chosen_console == "" ; then |
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| 112 | if terminal_input serial ; then true ; else |
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| 113 | terminal serial |
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| 114 | fi |
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| 115 | if terminal_output serial ; then true ; else |
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| 116 | terminal serial |
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| 117 | fi |
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| 118 | echo "hit ESC to use serial..." |
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| 119 | if sleep --interruptible 1 ; then true; else |
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| 120 | chosen_console=serial |
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| 121 | fi |
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| 122 | fi |
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| 123 | |
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| 124 | if test $chosen_console == "" ; then |
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| 125 | if terminal_input console ; then true ; else |
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| 126 | terminal console |
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| 127 | fi |
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| 128 | if terminal_output console ; then true ; else |
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| 129 | terminal console |
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| 130 | fi |
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| 131 | echo "hit ESC to use graphical console..." |
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| 132 | if sleep --interruptible 1 ; then true; else |
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| 133 | chosen_console=console |
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| 134 | fi |
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| 135 | fi |
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| 136 | |
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| 137 | if test $chosen_console == "" ; then |
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| 138 | if terminal_input serial ; then true ; else |
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| 139 | terminal serial |
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| 140 | fi |
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| 141 | if terminal_output serial ; then true ; else |
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| 142 | terminal serial |
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| 143 | fi |
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| 144 | echo "hit ESC to use serial..." |
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| 145 | if sleep --interruptible 1 ; then true; else |
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| 146 | chosen_console=serial |
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| 147 | fi |
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| 148 | fi |
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| 149 | |
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| 150 | ## END ABSURD LOOP |
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| 151 | |
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| 152 | # else we default to using the graphical console: |
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| 153 | |
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| 154 | echo "using graphical console" |
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| 155 | |
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| 156 | if terminal_input console ; then true ; else |
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| 157 | terminal console |
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| 158 | fi |
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| 159 | if terminal_output console ; then true ; else |
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| 160 | terminal console |
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| 161 | fi |
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| 162 | |
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| 163 | echo "using graphical console" |
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